Fix data == nullptr in ice_conversions

source/RobotAPI/libraries/armem/memory/ice_conversions.cpp

@@ -52,14 +52,20 @@ namespace armarx
     {
         detail::toIceItem(ice, data);
 
-        ice.data = data.data()->getResult();
+        if (data.data())
+        {
+            ice.data = data.data()->getResult();
+        }
         toIce(ice.metadata, data.metadata());
     }
     void armem::fromIce(const data::EntityInstance& ice, EntityInstance& data)
     {
         detail::fromIceItem(ice, data);
 
-        data.setData(aron::datanavigator::AronDataNavigator::FromAronData(ice.data));
+        if (ice.data)
+        {
+            data.setData(aron::datanavigator::AronDataNavigator::FromAronData(ice.data));
+        }
         fromIce(ice.metadata, data.metadata());
     }